[jboss-jira] [JBoss JIRA] Created: (JGRP-825) Message: add a flag to discard own multicast

[Bela Ban (JIRA)]

Message: add a flag to discard own multicast
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                 Key: JGRP-825
                 URL: https://jira.jboss.org/jira/browse/JGRP-825
             Project: JGroups
          Issue Type: Feature Request
            Reporter: Bela Ban
            Assignee: Bela Ban
             Fix For: 2.7


If we have a group consisting of members {A,B,C} and A wants to multicast to the group, it will receive its own message too. To avoid this, A can set option LOCAL on its channel to false, meaning that all messages sent by A will get discarded by A's channel.

The problem here is that those messages need to get handled nevertheless (e.g. by NAKACK, including retransmissions), all the way up the stack, until they hit the channel - only to be discarded there. This is a waste of resources (CPU and memory).

A solution is to discard the multicast at the transport level. If a message has a flag LOCAL set to false, then TP discards it if
- the message is a multicast message and
- the sender of the message is the local member


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